Merge branch 'x86-alternatives-for-linus' of git://git.kernel.org/pub/scm/linux/kerne...
[sfrench/cifs-2.6.git] / arch / x86 / include / asm / cpufeature.h
index 0b205b8a4308f6317d2ae2f00eb2ee2bb7dd2ec1..781a50b29a4917545e71c3e74bdcbbda7faa383d 100644 (file)
@@ -302,7 +302,7 @@ extern const char * const x86_power_flags[32];
  * patch the target code for additional performance.
  *
  */
  * patch the target code for additional performance.
  *
  */
-static __always_inline __pure bool __static_cpu_has(u8 bit)
+static __always_inline __pure bool __static_cpu_has(u16 bit)
 {
 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
                asm goto("1: jmp %l[t_no]\n"
 {
 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
                asm goto("1: jmp %l[t_no]\n"
@@ -311,11 +311,11 @@ static __always_inline __pure bool __static_cpu_has(u8 bit)
                         _ASM_ALIGN "\n"
                         _ASM_PTR "1b\n"
                         _ASM_PTR "0\n"         /* no replacement */
                         _ASM_ALIGN "\n"
                         _ASM_PTR "1b\n"
                         _ASM_PTR "0\n"         /* no replacement */
-                        " .byte %P0\n"         /* feature bit */
+                        " .word %P0\n"         /* feature bit */
                         " .byte 2b - 1b\n"     /* source len */
                         " .byte 0\n"           /* replacement len */
                         " .byte 2b - 1b\n"     /* source len */
                         " .byte 0\n"           /* replacement len */
-                        " .byte 0xff + 0 - (2b-1b)\n"  /* padding */
                         ".previous\n"
                         ".previous\n"
+                        /* skipping size check since replacement size = 0 */
                         : : "i" (bit) : : t_no);
                return true;
        t_no:
                         : : "i" (bit) : : t_no);
                return true;
        t_no:
@@ -329,10 +329,12 @@ static __always_inline __pure bool __static_cpu_has(u8 bit)
                             _ASM_ALIGN "\n"
                             _ASM_PTR "1b\n"
                             _ASM_PTR "3f\n"
                             _ASM_ALIGN "\n"
                             _ASM_PTR "1b\n"
                             _ASM_PTR "3f\n"
-                            " .byte %P1\n"             /* feature bit */
+                            " .word %P1\n"             /* feature bit */
                             " .byte 2b - 1b\n"         /* source len */
                             " .byte 4f - 3f\n"         /* replacement len */
                             " .byte 2b - 1b\n"         /* source len */
                             " .byte 4f - 3f\n"         /* replacement len */
-                            " .byte 0xff + (4f-3f) - (2b-1b)\n" /* padding */
+                            ".previous\n"
+                            ".section .discard,\"aw\",@progbits\n"
+                            " .byte 0xff + (4f-3f) - (2b-1b)\n" /* size check */
                             ".previous\n"
                             ".section .altinstr_replacement,\"ax\"\n"
                             "3: movb $1,%0\n"
                             ".previous\n"
                             ".section .altinstr_replacement,\"ax\"\n"
                             "3: movb $1,%0\n"
@@ -348,7 +350,7 @@ static __always_inline __pure bool __static_cpu_has(u8 bit)
 (                                                              \
        __builtin_constant_p(boot_cpu_has(bit)) ?               \
                boot_cpu_has(bit) :                             \
 (                                                              \
        __builtin_constant_p(boot_cpu_has(bit)) ?               \
                boot_cpu_has(bit) :                             \
-       (__builtin_constant_p(bit) && !((bit) & ~0xff)) ?       \
+       __builtin_constant_p(bit) ?                             \
                __static_cpu_has(bit) :                         \
                boot_cpu_has(bit)                               \
 )
                __static_cpu_has(bit) :                         \
                boot_cpu_has(bit)                               \
 )